Tubing bottom



ThomiasC. Patten;

T. C. PATTEN TUBING BOTTOM Filed Jan. 4, 1952 00W@ 0 @QQ Q Q Sept. 25,1934.

Patented Sept. 25, 1934 UNITED s'rll'ras PATENT OFFICE TUBING BGTTOM AThomas C. Patten, Tyler, Tex. Application January 4, 1932, Serial No.584,633

2 Claims. (Cl. Z55-61) This invention relates to a tubing bottom. Oneobject of the invention is to provide a well tubing having a novel typeof bottom which is provided with blades for the removal of the formationbeneath upon the rotation of the tubing and which has suitable inletopenings for the inflow of oil from the oil bearing stratum.

In the production of oil the well is drilled into the pay sand, that isinto the stratum bearing 1l) oil and the drilling tool is then withdrawnand a tubing is lowered into the hole through which the oil flows intothe ground surface. The tublng commonly used may be open at its lowerend ormay have a perforated section at its lower end `1li or a joint ofconventional screen. Under present drilling conditions it is oftendesirable or even necessary to limit the flow of oil from a well andconsequently the Well is usually drilled only a short distance into thepay sand, and a conf ventional type of tubing above referred to is then1 26 stratum is exhausted it then becomes necessary or desirable todeepen the well. At the present time with the type of tubing nowcommonly used in order to deepen the well the tubing must be removed anda drilling tool attached to the 30 lower end of the drill stem and letdown into the well to deepen it, and when deepened the Adrill stem andtool must be withdrawn and the tubing again set in place in the well andswabbed in order to start the flow as before. This operationnecessitates the movement of the necessary equipment onto the locationand consumes much time and adds to the expense of production. It is theprime object of this invention to provide a tubing bottom of suchconstruction as to permit the inflow of the production while the well ispro'- ducing and of such formation that when it is desired to deepen thewell, the tubing may be rotated and the well thus quickly deepenedfurther into the pay sand. v,

Another object of the invention is to provide a tubing bottom which willcatch objects such as swabs and the like, that may be accidentallydropped into the tubing and which may be withdrawn when the tubing iswithdrawn. At the present time tubing commonly used as above stated isopen at the bottom so that objects dropped through the tubing will passon out into the bore and will later give trouble when it is desired todeepen the well.

With the above and other objects in view the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawing, wherein:

Figure 1 shows a side view of a tubing equipped with the novel type ofbottom and shown located in the well.

Figure 2 shows an enlarged side view, partly in section of a tubingbottom.

Figure 3 shows a side view of a modified form thereof, and

Figure 4 shows a bottom end view.

Referring now more particularly to the drawing wherein like numerals ofreference designate similar parts in each of the figures the numeral 1designates a tubing located in a well bore 2 and whose lower end extendsdown into the pay sand 3. Fastened on the lower end of the tubing `thereis a shell 4 of an approximately inverted 75 conical shape and whoselower end has the external blades 5 which are preferably spiralledforwardly and extend out laterally from the shell. Three of these bladesare shown but any number may be employed, and they extend down be- 30neath the shell and are integrally joined together Vat the axis of theshell. The upper end of the shell is internally threaded to receive theexternally threaded lower end of the tubing and between the blades thelower end of the shell has 35 the inlet openings 6. These openings arepreferably triangular in form with their apex upwardly and they arerelatively large to permit the required inflow of fluid from the sand.It will be noted that the walls of the shell are of substantiallyuniform thickness and the shell is made hollow so as not to restrict theinflow of the fluid. If desired, the lower end of the shell may alsohave an axial opening 7 providing for the inflow of uid from the bottomof the bore.

In the form shown in Figure 3 the shell is extended upwardly forming atubular shank 8 which has the perforations 9 and whose upper end isinternally threaded to receive the lower end of the tubing. Theperforations 9 provide for the 100 inflow of additional fluid in casethe openings 6 and the bore 7 are inadequate for that purpose.

When the oil in the pierced stratum has become exhausted and it isdesired to deepen the bore, tongs may be applied to the upper end of thetubing at the ground surface and anadequate force of men may by the useof said tongs rotate the tubing until the bore is deepened the requiredamount and the tubing may then be again swabbed, if necessary, and theflow started. il@

The drawing and description disclose what is now considered to be apreferred form of the invention by way of illustration only, While thebroad principle of the invention will be defined by the appended claims.

What I claim is:

1. The combination with a well tubing, of a tubing bottom on the lowerend thereof, said bottom being shell-like in form and of a tubularshape, the Walls of said bottom being of approxmately the same thicknessas that of the tubing 2. 'I'he combination with a well tubing of atubing bottom on the lower end thereof, said bottom being shell like inform and of tubular shape and having an elongated upwardly extendedshank formed integrally therewith, the Walls of said bottom being ofapproximately the same thickness as that of the tubing and the inside ofthe diameter of the bottom being substantially the same as that of thetubing to provide an unobstructed passageway for fluid down through thetubing and bottom, the lower end of the bottom being slightly contractedand having unobstructed side inlet openings' and a central bottomopening, external radiating blades formed integrally with the sides andlower end of the bottom between said side openings, the lower ends ofsaid blades being joined integrally togetherA across the lower end ofthe bottom, the upper end of the shank being internally threaded andsaid shank being perforated therealong approximately from said threadedportion to the upper ends oi' the blades. I

THOMAS C. PATIEN.

